unsloth/tests/studio/playwright_chat_ime_i18n.py
Leo Borcherding 1dd2fc4583
tests: read checked-in files as UTF-8 instead of the platform default (#7438)
* tests: read checked-in files as UTF-8 instead of the platform default

Path.read_text() with no encoding uses locale.getpreferredencoding(), which
is UTF-8 on the Linux runners and cp1252 on a stock Windows install. Nine
module-level reads of checked-in source files were relying on that default.

studio/backend/routes/inference.py carries the DeepSeek tool-call token
regexes, so it holds U+FF5C and U+2581. Under cp1252 that read raised
UnicodeDecodeError on byte 0x81 at position 97806, and because the reads run
at import time it took test_cancel_atomicity.py and test_cancel_id_wiring.py
out at collection, not as failures. Green on CI, permanently broken for a
Windows contributor running the suite locally.

Adds a guard: at module scope there is no tmp_path fixture, so a bare
read_text()/write_text()/open() there is always touching a checked-in file.
That makes the rule mechanical enough to enforce with no allowlist, while
staying quiet about temp-dir I/O inside test bodies where the platform
default is harmless.

The repo already spells this correctly in 464 other places; this only stops
the stragglers coming back.

* tests: cover import-time helper reads and keep the guard py3.9-safe

Follows up on the Codex review:

- add `from __future__ import annotations`, since `str | None` in
  `_offender` is evaluated at import on Python 3.9 and pyproject declares
  requires-python ">=3.9,<3.15".
- widen the guard from module scope to import time. Class bodies and the
  bodies of module-level helpers called from an executing statement run
  during collection too, so `CODE = _extract_mixed_precision_code()` was
  the same hazard as an inline read. `if __name__ == "__main__":` blocks
  are skipped: pytest never executes them.
- scan studio/backend/tests/ as well as tests/. Both trees are collected
  on Windows by separate CI jobs, and the offender that started this,
  test_tool_xml_strip.py reading routes/inference.py, lives there.

Widening it surfaced seven more import-time reads of checked-in sources;
all now name utf-8.

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Harden the import-time encoding guard for PR #7438

Close the detector gaps raised in review, all of which I reproduced against
the actual AST before changing anything.

False negatives (the guard let a real hazard through):
- _is_main_guard ignored the comparison operator, so if __name__ != "__main__"
  counted as script-only even though its body runs at import.
- The else arm of a main guard was discarded with the rest of the If node.
- Decorators and argument defaults on a module-level def were skipped with the
  body, though both are evaluated when the def executes.
- Path.open() in text mode was invisible; only builtin open() was matched.
- encoding = None and encoding = "locale" both re-select the platform default,
  but the keyword merely being present counted as pinned.

False positives (the guard would have blocked a compliant contributor):
- A non-literal mode fell through to the "r" default, so open(p, mode) was
  flagged even when mode is "rb", where adding encoding= is a ValueError and
  there is no edit that satisfies the rule.
- Same for open(*args) and a **kwargs splat, which hide the mode and can hide
  an encoding.
- Lambda bodies and comprehension elements were walked even though neither runs
  at definition.

Verified: still reports the same 22 offenders on unpatched main, green on this
branch and on the tree merged with latest main (557 files), and an adversarial
corpus of 33 cases now scores zero false positives and zero false negatives.
Also corrected two docstring claims: neither collecting job runs on Windows,
and the read is governed by locale.getencoding().

* Walk eager comprehensions and treat io.open as the builtin

Two regressions from the previous commit, both reproduced against the AST
before changing anything.

Lumping list, set and dict comprehensions in with generator expressions was
wrong. Only a genexp is lazy; the other three run their element expression,
their filters and their nested iterators immediately, so
CONTENTS = [p.read_text() for p in PATHS] at module scope is an import-time
read the guard was silently missing. Comprehensions are now walked in full and
only the genexp keeps the outermost-iterable-only treatment.

io was also in the not-a-path-opener list, but io.open is the builtin, with the
same mode position and the same platform default. io.open(CHECKED_IN_FILE) is
exactly the hazard this guard exists for, so it is matched now, with binary
modes and a pinned encoding still exempt. tarfile.open and fitz.open stay
exempt since neither has an encoding to name.

Verified: 13 targeted cases covering all five eager comprehension forms and
io.open in text, binary and pinned shapes all classify correctly; still 22
offenders on unpatched main; green on this branch and on the tree merged with
latest main.

* Close three more walker gaps in the import-time guard

All three reproduced against the AST first.

A generator expression handed straight to a call is consumed there, so
DATA = "".join(p.read_text() for p in paths) runs its element at import. Only
an unconsumed genexp bound to a name stays lazy, so the walker now follows the
consumed ones in full and keeps the outermost-iterable-only treatment for the
rest.

if "__main__" == __name__ is an equivalent and accepted spelling of the main
guard, but requiring __name__ on the left meant its body was treated as
import-time code. That is a false positive on a block pytest never runs, so
both operand orders are recognised now.

The helper table was built from module-level defs only, so a def in a class
body invoked while the class is constructed was never followed, contradicting
the walker's stated coverage of class bodies. Helpers are now collected from
the module body and from class bodies at any nesting.

Verified: 15 targeted cases including all three fixes and the earlier ones
still classify correctly; still 22 offenders on unpatched main; green on this
branch and on the tree merged with latest main.

* Handle positional read_text encodings, lazy generators and nested helpers

* Guard reads reached from test bodies, unbound Path calls and __file__ paths

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Follow derived paths, skip lazy generator helpers, cover compressed openers

* Guard the CLI tests, helper parameters and unbound Path arguments

* Discover test roots and follow literal, in-place and tuple-derived paths

* Identify module openers by import, unwrap starred paths, pin subprocess snippets

* Resolve import origins, seed helper locals, follow named generators and parametrize

* Scope imports lexically, list tracked test files, bind unpacked names

* Resolve aliased openers, keyword-only params, destructured targets, next()

* Pin the encoding on subprocess snippets, workflow lint and CLI output for PR #7438

* Harden the CLI encoding guard against detached streams for PR #7438

* Tighten the encoding guard's path and scope analysis for PR #7438

* Resolve path provenance more precisely and keep POSIX stream encodings for PR #7438

* Resolve qualified path classes and scope conditional imports for PR #7438

* Scope CLI stream setup to the entry point and align two encoding pairs for PR #7438

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: danielhanchen <danielhanchen@gmail.com>
2026-07-26 23:31:56 -07:00

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# SPDX-License-Identifier: AGPL-3.0-only
# Copyright 2026-present the Unsloth AI Inc. team. All rights reserved. See /studio/LICENSE.AGPL-3.0
"""Unsloth chat composer IME + multilingual regression smoke.
Covers: stuck IME composition (#5318 / PR #5327), multilingual paste round-trip,
stuck compositionend (#5546), and Mac input-method switch recovery (keydown/blur).
Model-free; the bug surface is the composer, not inference. Env contract matches
playwright_chat_ui.py: BASE_URL, STUDIO_NEW_PW, PW_ART_DIR, STUDIO_UI_STRICT.
"""
import os
import sys
from pathlib import Path
from playwright.sync_api import expect, sync_playwright
sys.path.insert(0, str(Path(__file__).resolve().parent))
from _playwright_robust import ( # noqa: E402
chromium_launch_args,
click_and_wait_for_response,
install_view_transition_killer,
install_wall_clock_watchdog,
is_benign_console_error,
is_benign_page_error,
recover_or_replace_page,
wait_for_health,
)
BASE = os.environ["BASE_URL"]
NEW = os.environ["STUDIO_NEW_PW"]
ART_DIR = os.environ.get("PW_ART_DIR", "logs/playwright_ime")
ART = Path(ART_DIR)
ART.mkdir(parents = True, exist_ok = True)
STRICT = os.environ.get("STUDIO_UI_STRICT", "0") == "1"
# Wall-clock cap: 5 min leaves cold-launch headroom over the 30-60s run.
WALL_TIMEOUT_S = float(os.environ.get("STUDIO_IME_WALL_TIMEOUT_S", "300"))
# One greeting + arithmetic per script; each catches a distinct Unicode class.
I18N_SAMPLES = [
("en", "English", "Hello, 1+1=2"),
("zh-CN", "Chinese (Simplified)", "你好1+1=2"),
("es", "Spanish", "Hola, 1+1=2"),
("hi", "Hindi (Devanagari)", "नमस्ते, 1+1=2"),
("ar", "Arabic (RTL)", "مرحبا، ١+١"),
("bn", "Bengali", "নমস্কার, ১+১=২"),
("pt", "Portuguese", "Olá, 1+1=2"),
("ru", "Russian (Cyrillic)", "Привет, 1+1=2"),
("ja", "Japanese", "こんにちは、1+1=2"),
("pa", "Punjabi (Gurmukhi)", "ਸਤ ਸ੍ਰੀ ਅਕਾਲ, 1+1=2"),
("de", "German", "Hallo, 1+1=2"),
("jv", "Javanese", "Halo, 1+1=2"),
("ko", "Korean (Hangul)", "안녕하세요, 1+1=2"),
("fr", "French", "Bonjour, 1+1=2"),
("tr", "Turkish", "Merhaba, 1+1=2"),
("vi", "Vietnamese (diacritics)", "Xin chào, 1+1=2"),
("ur", "Urdu (Arabic-Naskh)", "ہیلو، 1+1=2"),
("ta", "Tamil", "வணக்கம், 1+1=2"),
("te", "Telugu", "నమస్తే, 1+1=2"),
("mr", "Marathi (Devanagari)", "नमस्कार, 1+1=2"),
("it", "Italian", "Ciao, 1+1=2"),
("th", "Thai", "สวัสดี, ๑+๑=๒"),
("pl", "Polish", "Cześć, 1+1=2"),
("uk", "Ukrainian (Cyrillic)", "Привіт, 1+1=2"),
("fa", "Persian (RTL)", "سلام، ۱+۱"),
("nl", "Dutch", "Hallo, 1+1=2"),
("he", "Hebrew (RTL)", "שלום, 1+1=2"),
("el", "Greek", "Γειά, 1+1=2"),
("id", "Indonesian", "Halo, 1+1=2"),
("sw", "Swahili", "Habari, 1+1=2"),
("emoji", "Emoji + ZWJ + flag", "👋 🇺🇳 👨‍👩‍👧‍👦 1+1=2"),
]
_n = [0]
def step(s):
print(f"[ime] STEP {s}", flush = True)
def info(s):
print(f"[ime] {s}", flush = True)
def fail(m):
raise AssertionError(f"[ime] FAIL: {m}")
def soft_fail(m):
"""Hard fail in STRICT mode, else info-warn (mirrors playwright_chat_ui.py)."""
if STRICT:
fail(m)
info(f"WARN (strict-off): {m}")
with sync_playwright() as p:
_watchdog = install_wall_clock_watchdog(
WALL_TIMEOUT_S,
label = "ime",
info = info,
)
wait_for_health(BASE, timeout = 30.0, info = info)
browser = p.chromium.launch(
headless = True,
args = chromium_launch_args(),
)
ctx = browser.new_context(
viewport = {"width": 1280, "height": 900},
reduced_motion = "reduce",
)
install_view_transition_killer(ctx)
page = ctx.new_page()
page.set_default_timeout(60_000)
page_errors: list[str] = []
console_errors: list[str] = []
expected_probe_cancel_500s = [0]
def _on_console(m):
if m.type != "error":
return
try:
console_errors.append(m.text)
except Exception:
return
def _attach_listeners(target):
target.on("pageerror", lambda e: page_errors.append(str(e)))
target.on("console", _on_console)
_attach_listeners(page)
def shoot(name):
_n[0] += 1
try:
page.screenshot(
path = str(ART / f"{_n[0]:02d}-{name}.png"),
full_page = True,
timeout = 90_000,
animations = "disabled",
)
except Exception as _shoot_err:
info(f"WARN: screenshot {name} failed: {_shoot_err}")
# 1. Bootstrap auth via /change-password; retry absorbs React form-detach races.
step("change-password through UI (Setup your account)")
form_err: Exception | None = None
for _form_attempt in range(3):
try:
page.goto(
f"{BASE}/change-password",
wait_until = "domcontentloaded",
timeout = 60_000,
)
try:
page.wait_for_load_state("networkidle", timeout = 30_000)
except Exception:
pass
pw_field = page.locator("#new-password")
pw_field.wait_for(state = "visible", timeout = 60_000)
pw_field.fill(NEW, timeout = 60_000)
page.fill("#confirm-password", NEW, timeout = 60_000)
shoot("01-change-password-filled")
status, _ = click_and_wait_for_response(
page,
url_substr = "/api/auth/change-password",
method = "POST",
do_click = lambda: page.locator('button[type="submit"]').click(),
timeout_ms = 30_000,
info = lambda m: print(f"[ime] {m}", flush = True),
)
if status is not None and status >= 400:
raise AssertionError(f"change-password POST returned {status}")
form_err = None
break
except Exception as e:
form_err = e
info(
f"change-password attempt {_form_attempt + 1} failed: "
f"{type(e).__name__}: {str(e)[:200]}"
)
if _form_attempt < 2:
page = recover_or_replace_page(
page,
ctx,
default_timeout_ms = 60_000,
info = lambda m: print(f"[ime] recovery: {m}", flush = True),
)
_attach_listeners(page)
if form_err is not None:
raise form_err
# 2. Wait for composer mount (no GGUF; the bug is React state, not inference).
step("wait for composer to mount")
try:
page.wait_for_load_state("networkidle", timeout = 30_000)
except Exception:
pass
composer = page.locator('textarea[aria-label="Message input"]')
_mount_err: Exception | None = None
for _mount_attempt in range(2):
try:
composer.wait_for(state = "visible", timeout = 60_000)
_mount_err = None
break
except Exception as e:
_mount_err = e
info(
f"composer.wait_for attempt {_mount_attempt + 1} failed: "
f"{type(e).__name__}: {str(e)[:200]}"
)
try:
shoot(f"02-composer-wait-attempt-{_mount_attempt + 1}-fail")
except Exception:
pass
if _mount_attempt == 0:
page = recover_or_replace_page(
page,
ctx,
default_timeout_ms = 60_000,
info = lambda m: print(f"[ime] recovery: {m}", flush = True),
)
_attach_listeners(page)
composer = page.locator('textarea[aria-label="Message input"]')
if _mount_err is not None:
raise _mount_err
composer.click()
shoot("02-composer-focused")
# Main composer must carry dir="auto" so RTL flows right-to-left.
dir_attr = composer.evaluate("(el) => el.getAttribute('dir')")
if dir_attr != "auto":
soft_fail(
f'composer is missing dir="auto" (got {dir_attr!r}); RTL ' "languages will render LTR."
)
else:
info('composer dir="auto" present')
# Source-level guard: grep the unmounted edit/compare composers' JSX for dir="auto".
_repo_root = Path(__file__).resolve().parents[2]
_thread_src = (_repo_root / "studio/frontend/src/components/assistant-ui/thread.tsx").read_text(
encoding = "utf-8"
)
_shared_src = (_repo_root / "studio/frontend/src/features/chat/shared-composer.tsx").read_text(
encoding = "utf-8"
)
_edit_idx = _thread_src.find("aui-edit-composer-input")
if _edit_idx == -1 or 'dir="auto"' not in _thread_src[_edit_idx : _edit_idx + 600]:
soft_fail('edit composer source is missing dir="auto"')
else:
info('edit composer dir="auto" present (source)')
_compare_idx = _shared_src.find("Send to both models")
if (
_compare_idx == -1
or 'dir="auto"' not in _shared_src[max(_compare_idx - 400, 0) : _compare_idx + 400]
):
soft_fail('compare composer source is missing dir="auto"')
else:
info('compare composer dir="auto" present (source)')
def read_value() -> str:
return composer.evaluate("(el) => el.value")
def set_value_via_setter(s: str) -> str:
"""Write via React's setter + paste event, await two rAFs so the controlled
value commits before readback (plain `.value=s` is overwritten on render)."""
return composer.evaluate(
"""async (el, v) => {
const setter = Object.getOwnPropertyDescriptor(
window.HTMLTextAreaElement.prototype, 'value'
).set;
setter.call(el, v);
el.dispatchEvent(new InputEvent('input', {
bubbles: true,
inputType: 'insertFromPaste',
data: v,
}));
await new Promise((r) => requestAnimationFrame(r));
await new Promise((r) => requestAnimationFrame(r));
return el.value;
}""",
s,
)
def clear() -> None:
set_value_via_setter("")
def restore_idle_composer_after_probe(label: str) -> None:
"""Cancel a real run started by a submit probe before the next case."""
stop_btn = page.locator('button[aria-label="Stop generating"]')
send_btn = page.locator('button[aria-label="Send message"]')
allowed_cancel_500 = False
try:
stop_btn.wait_for(state = "visible", timeout = 5_000)
expected_probe_cancel_500s[0] += 1
allowed_cancel_500 = True
stop_btn.click(timeout = 5_000)
info(f"{label}: stopped generation started by submit probe")
except Exception:
if allowed_cancel_500:
expected_probe_cancel_500s[0] = max(0, expected_probe_cancel_500s[0] - 1)
try:
expect(send_btn).to_be_visible(timeout = 15_000)
except Exception:
shoot(f"{label}-idle-restore-FAIL")
fail(
"Composer did not return to idle after the submit probe; "
"Send button is unavailable for the next IME regression case."
)
# 3. Baseline: ASCII keyboard typing works.
step("baseline ASCII keyboard typing")
clear()
composer.click()
for ch in "hello world":
page.keyboard.type(ch)
got = read_value()
if got != "hello world":
fail(f"ASCII typing readback {got!r} != 'hello world'")
info("baseline ASCII OK")
shoot("03-baseline-ascii")
clear()
# 4. Multilingual paste round-trip; byte-for-byte readback required.
step(f"multilingual paste round-trip ({len(I18N_SAMPLES)} samples)")
paste_failures: list[tuple[str, str, str, str]] = []
for code, label, text in I18N_SAMPLES:
got = set_value_via_setter(text)
if got != text:
paste_failures.append((code, label, text, got))
info(f" {code:>6} ({label}): FAIL -- got {got!r}")
else:
info(f" {code:>6} ({label}): OK")
clear()
if paste_failures:
shoot("04-paste-failures")
lines = [
f" {code} ({label}): want={want!r} got={got!r}"
for code, label, want, got in paste_failures
]
fail(
f"{len(paste_failures)}/{len(I18N_SAMPLES)} languages failed paste round-trip:\n"
+ "\n".join(lines)
)
info(f"all {len(I18N_SAMPLES)} multilingual paste samples OK")
shoot("04-paste-all-ok")
# 5. Healthy IME composition (compositionstart/update/end + insert events).
step("normal IME composition (compose 你好)")
clear()
composer.click()
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new CompositionEvent('compositionstart', {bubbles:true, data:''}));
el.dispatchEvent(new CompositionEvent('compositionupdate', {bubbles:true, data:''}));
el.dispatchEvent(new CompositionEvent('compositionupdate', {bubbles:true, data:'你好'}));
const setter = Object.getOwnPropertyDescriptor(
window.HTMLTextAreaElement.prototype, 'value'
).set;
setter.call(el, el.value + '你好');
el.dispatchEvent(new InputEvent('input', {
bubbles:true, inputType:'insertCompositionText',
data:'你好', isComposing:true,
}));
el.dispatchEvent(new CompositionEvent('compositionend', {bubbles:true, data:'你好'}));
el.dispatchEvent(new InputEvent('input', {
bubbles:true, inputType:'insertFromComposition', data:'你好',
}));
}"""
)
got = read_value()
if "你好" not in got:
shoot("05-normal-composition-FAIL")
fail(f"normal composition readback {got!r} missing '你好'")
info(f"normal composition OK: ta.value={got!r}")
shoot("05-normal-composition")
clear()
# 6. Stuck IME repro (#5318): duplicate compositionstart wedges
# isComposing=true; PR #5327 clears it on non-composing input.
step("BUG REPRO: stuck IME composition recovery (issue #5318)")
clear()
composer.click()
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new CompositionEvent('compositionstart', {bubbles:true, data:''}));
// Duplicate compositionstart with NO matching compositionend.
// This is exactly the event sequence observed from the IMEs
// in issue #5318 (kei-yamazaki / langxiaopiao030 / PapyrusNotes).
el.dispatchEvent(new CompositionEvent('compositionstart', {bubbles:true, data:''}));
}"""
)
# On the broken build React drops 'abcd' and reconciles el.value to ''.
# wait_for_function crosses the microtask boundary to see committed state.
page.keyboard.type("abcd")
try:
page.wait_for_function(
"""(el) => el.value === 'abcd'""",
composer.element_handle(),
timeout = 5_000,
)
except Exception:
pass
after_key = read_value()
info(f"after_key='abcd' readback={after_key!r}")
shoot("06-stuck-composition-recovery")
if after_key != "abcd":
fail(
"stuck-composition repro: keyboard 'abcd' was not preserved after "
f"duplicate compositionstart; readback {after_key!r}. React state "
"likely still stuck in isComposing=true (issue #5318 / before "
"PR #5327)."
)
# Cross-check isComposing via the Send button: it stays disabled while
# isComposing is true (PR #5327).
send_btn = page.locator('button[aria-label="Send message"]')
if send_btn.count() == 0:
soft_fail("Send button not found after stuck-composition recovery")
else:
try:
expect(send_btn).not_to_be_disabled(timeout = 5_000)
info("Send button correctly enabled after stuck-composition recovery")
except Exception:
soft_fail(
"Send button still disabled after stuck-composition recovery -- "
"React isComposing state likely never cleared"
)
info("stuck-composition recovery PASS")
clear()
# 6b. WSL+Chrome repro (#5546): Chrome never emits compositionend after the
# IME commit, so the watchdog must release the composing flag once events
# go silent.
step("BUG REPRO: stuck compositionend recovery (issue #5546)")
clear()
composer.click()
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new CompositionEvent('compositionstart', {bubbles:true, data:''}));
el.dispatchEvent(new CompositionEvent('compositionupdate', {bubbles:true, data:''}));
el.dispatchEvent(new CompositionEvent('compositionupdate', {bubbles:true, data:'你好'}));
const setter = Object.getOwnPropertyDescriptor(
window.HTMLTextAreaElement.prototype, 'value'
).set;
setter.call(el, el.value + '你好');
el.dispatchEvent(new InputEvent('input', {
bubbles:true, inputType:'insertCompositionText',
data:'你好', isComposing:true,
}));
// Deliberately omit compositionend; that is the WSL/Chrome
// bug surface. The watchdog in useImeComposerInputHandlers
// should reset isComposing after IME_STUCK_TIMEOUT_MS.
}"""
)
send_btn_5546 = page.locator('button[aria-label="Send message"]')
if send_btn_5546.count() == 0:
soft_fail("Send button not found for #5546 repro")
else:
# Watchdog is 2500ms; allow generous slack for slow CI.
try:
expect(send_btn_5546).not_to_be_disabled(timeout = 8_000)
info("Send button enabled after compositionend never fired")
except Exception:
shoot("06b-compositionend-watchdog-FAIL")
fail(
"Send button stayed disabled with no compositionend; "
"watchdog did not release the composing flag (issue #5546)."
)
after_value = read_value()
if "你好" not in after_value:
soft_fail(f"compositionend-watchdog repro lost committed text: {after_value!r}")
shoot("06b-compositionend-watchdog")
info("compositionend watchdog recovery PASS")
clear()
# 6c. Watchdog-race repro: after the watchdog clears composingRef, a later
# IME keydown (keyCode 229) must not slip preedit text through submit.
# The onKeyDown gate re-pins composingRef so handleSubmit refuses.
step("BUG REPRO: keydown re-pin after watchdog cleared composing (issue #5546 follow-up)")
clear()
composer.click()
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new CompositionEvent('compositionstart', {bubbles:true, data:''}));
el.dispatchEvent(new CompositionEvent('compositionupdate', {bubbles:true, data:''}));
const setter = Object.getOwnPropertyDescriptor(
window.HTMLTextAreaElement.prototype, 'value'
).set;
setter.call(el, el.value + '半角');
el.dispatchEvent(new InputEvent('input', {
bubbles:true, inputType:'insertCompositionText',
data:'半角', isComposing:true,
}));
}"""
)
send_btn_keydown = page.locator('button[aria-label="Send message"]')
# Wait past the watchdog so composingRef has cleared.
try:
expect(send_btn_keydown).not_to_be_disabled(timeout = 8_000)
except Exception:
soft_fail("watchdog did not clear before keydown re-pin test")
# Fire IME-confirm Enter (keyCode 229) then submit synchronously: the keydown
# gate re-pins composingRef before handleSubmit, so preedit text is retained.
submit_probe = composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new KeyboardEvent('keydown', {
bubbles:true, key:'Enter', code:'Enter', keyCode:229,
isComposing:true,
}));
const form = el.closest('form');
const before = el.value;
try { form && form.requestSubmit(); } catch (e) {}
return {before, after: el.value, cleared: before !== '' && el.value === ''};
}"""
)
if submit_probe.get("cleared"):
shoot("06c-keydown-repin-FAIL")
fail(
"Form submitted after an IME keydown -- preedit text leaked "
"through the watchdog gap (#5546 follow-up regression)."
)
info(f"Form submit refused after IME keydown; textarea retained {submit_probe.get('after')!r}")
shoot("06c-keydown-repin")
info("keydown re-pin gate PASS")
clear()
# 6d. Keydown re-pin must also re-arm the watchdog: on the WSL+Chrome
# stuck-compositionend path no follow-up event arrives, so after re-pin
# the watchdog must clear composingRef again or Send re-locks forever.
step("BUG REPRO: keydown re-pin re-arms watchdog (#5546 follow-up regression)")
clear()
composer.click()
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new CompositionEvent('compositionstart', {bubbles:true, data:''}));
el.dispatchEvent(new CompositionEvent('compositionupdate', {bubbles:true, data:''}));
const setter = Object.getOwnPropertyDescriptor(
window.HTMLTextAreaElement.prototype, 'value'
).set;
setter.call(el, el.value + '你好');
el.dispatchEvent(new InputEvent('input', {
bubbles:true, inputType:'insertCompositionText',
data:'你好', isComposing:true,
}));
}"""
)
send_btn_rearm = page.locator('button[aria-label="Send message"]')
# First watchdog cycle: wait for it to clear composingRef.
try:
expect(send_btn_rearm).not_to_be_disabled(timeout = 8_000)
except Exception:
soft_fail("watchdog did not clear before re-arm test (first cycle)")
# IME-confirm keydown re-pins composingRef; without the re-arm fix the
# watchdog never runs again and Send stays blocked forever.
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new KeyboardEvent('keydown', {
bubbles:true, key:'Enter', code:'Enter', keyCode:229,
isComposing:true,
}));
}"""
)
# Second watchdog cycle: requestSubmit() after the re-armed window must be
# allowed; the buggy build stays gated forever.
rearm_probe = page.evaluate(
"""async (selector) => {
const ta = document.querySelector(selector);
const form = ta && ta.closest('form');
if (!form || !ta) return {ok: false, reason: 'composer missing'};
const before = ta.value;
// Wait past the 2500ms watchdog + slack so the re-armed timer
// fires. If the fix is missing this still resolves but the
// submit will not flush the textarea.
await new Promise(r => setTimeout(r, 3500));
try { form.requestSubmit(); } catch (e) {}
// Give the submit handler a tick to flush state.
await new Promise(r => setTimeout(r, 250));
return {ok: true, before, after: ta.value};
}""",
'textarea[aria-label="Message input"]',
)
if rearm_probe.get("ok") and rearm_probe.get("after") == rearm_probe.get("before"):
shoot("06d-keydown-rearm-FAIL")
fail(
"After the keydown re-pin the watchdog never re-armed; Send "
"stayed permanently locked on the WSL+Chrome stuck-end path "
"(#5546 follow-up regression)."
)
info(
"watchdog re-armed after keydown re-pin: textarea flushed from "
f"{rearm_probe.get('before')!r} to {rearm_probe.get('after')!r}"
)
shoot("06d-keydown-rearm")
info("keydown re-pin re-arm PASS")
restore_idle_composer_after_probe("06d-keydown-rearm")
clear()
# 6e. Mac input-method switch - onKeyDown immediate recovery.
# A Mac IME switch fires compositionstart but never compositionend; the
# first English keydown (isComposing=false) must clear composingRef via
# the onKeyDown else-if branch, before the 2500ms watchdog fires.
# To isolate that path (not onChange) we dispatch a synthetic keydown with
# NO follow-up input event, so onChange never fires.
step("BUG REPRO: Mac IME switch - onKeyDown immediate recovery")
clear()
composer.click()
# Seed sendable content so Send's state reflects composition only, not
# empty-content gating (insertFromPaste leaves composingRef false).
set_value_via_setter("hello")
# Switch TO Chinese: compositionstart fires but compositionend never arrives.
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new CompositionEvent('compositionstart', {bubbles:true, data:''}));
}"""
)
# Let React process compositionstart and update isComposing.
page.wait_for_timeout(200)
send_btn_mac_kd = page.locator('button[aria-label="Send message"]')
# Dispatch ONLY a keydown (no input event) so onChange never fires and the
# onKeyDown else-if branch is the only path that can clear composingRef.
# page.keyboard.type() would fire onChange too and mask a regression.
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new KeyboardEvent('keydown', {
bubbles: true, key: 'a', code: 'KeyA', keyCode: 65,
isComposing: false,
}));
}"""
)
if send_btn_mac_kd.count() == 0:
soft_fail("Send button not found for Mac IME switch (onKeyDown) repro")
else:
try:
# 1500ms < 2500ms watchdog: only the onKeyDown else-if path can
# clear composingRef this quickly.
expect(send_btn_mac_kd).not_to_be_disabled(timeout = 1_500)
info(
"Send button enabled within 1500ms after Mac IME switch + "
"English keydown (onKeyDown else-if branch fired, not watchdog)"
)
except Exception:
shoot("06e-mac-ime-keydown-FAIL")
fail(
"Send button stayed disabled after Mac input-method switch + "
"English keydown; the onKeyDown else-if branch did not clear "
"composingRef immediately (expected recovery in < 1500ms)."
)
shoot("06e-mac-ime-keydown")
info("Mac IME switch onKeyDown recovery PASS")
clear()
# 6f. Candidate-confirming Enter must not unblock submit.
# Some IMEs report it as isComposing=false/keyCode=13 while composingRef
# is still pinned; it must be swallowed and keep Send disabled, else it
# submits before the candidate is committed.
step("BUG REPRO: Mac IME switch - Enter must not unblock submit")
clear()
composer.click()
set_value_via_setter("hello")
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new CompositionEvent('compositionstart', {bubbles:true, data:''}));
}"""
)
page.wait_for_timeout(200)
send_btn_mac_enter = page.locator('button[aria-label="Send message"]')
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new KeyboardEvent('keydown', {
bubbles: true, cancelable: true, key: 'Enter', code: 'Enter',
keyCode: 13, isComposing: false,
}));
}"""
)
try:
expect(send_btn_mac_enter).to_be_disabled(timeout = 500)
info("Enter while composingRef is stuck kept Send disabled")
except Exception:
shoot("06f-mac-ime-enter-guard-FAIL")
fail(
"Enter cleared a stuck composingRef immediately; candidate-confirming "
"Enter can fall through to submit."
)
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new KeyboardEvent('keydown', {
bubbles: true, key: 'a', code: 'KeyA', keyCode: 65,
isComposing: false,
}));
}"""
)
try:
expect(send_btn_mac_enter).not_to_be_disabled(timeout = 1_500)
info("non-Enter key after Enter guard still recovers immediately")
except Exception:
shoot("06f-mac-ime-enter-guard-recovery-FAIL")
fail("After guarding Enter, a later non-IME key did not clear composingRef immediately.")
shoot("06f-mac-ime-enter-guard")
info("Mac IME switch Enter guard PASS")
clear()
# 6g. Mac input-method switch - onBlur immediate recovery.
# Some Mac IME switches steal textarea focus; onBlur resets composingRef
# unconditionally. Safe because the OS commits/cancels composition before
# surrendering focus, so blur is a reliable reset point.
step("BUG REPRO: Mac IME switch - onBlur immediate recovery")
clear()
composer.click()
# Seed sendable content so Send's state reflects composition only.
set_value_via_setter("hello")
# Switch TO Chinese: compositionstart fires, compositionend never comes.
composer.evaluate(
"""(el) => {
el.focus();
el.dispatchEvent(new CompositionEvent('compositionstart', {bubbles:true, data:''}));
}"""
)
page.wait_for_timeout(200)
send_btn_mac_blur = page.locator('button[aria-label="Send message"]')
# Blur to simulate the OS stealing focus during an IME switch.
composer.evaluate("(el) => el.blur()")
# onBlur clears composition; re-focus so React renders the updated Send state.
composer.click()
if send_btn_mac_blur.count() == 0:
soft_fail("Send button not found for Mac IME switch (onBlur) repro")
else:
try:
# 1500ms < 2500ms watchdog: only onBlur can clear composingRef this
# quickly when no keydown is fired.
expect(send_btn_mac_blur).not_to_be_disabled(timeout = 1_500)
info(
"Send button enabled within 1500ms after Mac IME switch + "
"textarea blur (onBlur handler fired, not watchdog)"
)
except Exception:
shoot("06f-mac-ime-blur-FAIL")
fail(
"Send button stayed disabled after Mac input-method switch + "
"textarea blur; the onBlur handler did not reset composingRef "
"(expected recovery in < 1500ms)."
)
shoot("06g-mac-ime-blur")
info("Mac IME switch onBlur recovery PASS")
clear()
# 7. Final state: filter benign 401 noise via is_benign_*; fail on real errors.
shoot("07-final")
real_page_errors = [e for e in page_errors if not is_benign_page_error(e)]
probe_cancel_500_allowance = expected_probe_cancel_500s[0]
real_console_errors = []
for error in console_errors:
if is_benign_console_error(error):
continue
if (
probe_cancel_500_allowance > 0
and "Failed to load resource: the server responded with a status of 500" in error
and "Internal Server Error" in error
):
probe_cancel_500_allowance -= 1
continue
real_console_errors.append(error)
info(
f"page_errors={len(page_errors)} ({len(real_page_errors)} non-benign); "
f"console_errors={len(console_errors)} "
f"({len(real_console_errors)} non-benign)"
)
if page_errors:
info(f"first page error: {page_errors[0][:200]!r}")
if console_errors:
info(f"first console error: {console_errors[0][:200]!r}")
if real_page_errors:
fail(
f"{len(real_page_errors)} non-benign pageerror events; "
f"first={real_page_errors[0][:200]!r}"
)
if real_console_errors:
fail(
f"{len(real_console_errors)} non-benign console.error events; "
f"first={real_console_errors[0][:200]!r}"
)
info(
f"DONE: ascii=OK paste={len(I18N_SAMPLES)}/{len(I18N_SAMPLES)} "
f"normal_composition=OK stuck_recovery=OK "
f"compositionend_watchdog=OK keydown_repin=OK "
f"keydown_repin_rearm=OK "
f"mac_ime_switch_keydown=OK mac_ime_switch_enter_guard=OK "
f"mac_ime_switch_blur=OK"
)
_watchdog.cancel()
browser.close()